Send form 119 to your CA and CC to council within 15 days of your articles completion.. Your CA will have to respond to that within 90 + 15 days else the details you send will deemed to be conclusive..
As you say, your CA does not have proper records, you can always contradict his claims to the council.
And/ or,
1. you can fill and get form 108 and 107 (extension) signed.. And then don't send form 107, serve the excess under some other CA..
2. you give verbal assurance that you will continue and say that have to send the form within 30 days or else, fine would have to be sent for the delay along with justification by CA for the delay... etc.. cook something sensible..